EP0269129A3 - Thin film magnetic head - Google Patents

Thin film magnetic head Download PDF

Info

Publication number
EP0269129A3
EP0269129A3 EP19870117664 EP87117664A EP0269129A3 EP 0269129 A3 EP0269129 A3 EP 0269129A3 EP 19870117664 EP19870117664 EP 19870117664 EP 87117664 A EP87117664 A EP 87117664A EP 0269129 A3 EP0269129 A3 EP 0269129A3
Authority
EP
European Patent Office
Prior art keywords
thin film
magnetic head
film magnetic
head
thin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19870117664
Other versions
EP0269129A2 (en
EP0269129B1 (en
Inventor
Kazuhiko C/O Nec Corporation Yamada
Takao C/O Nec Corporation Maruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP28478586A external-priority patent/JPH065572B2/en
Priority claimed from JP28478786A external-priority patent/JPH0782612B2/en
Priority claimed from JP28478486A external-priority patent/JPH0618057B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0269129A2 publication Critical patent/EP0269129A2/en
Publication of EP0269129A3 publication Critical patent/EP0269129A3/en
Application granted granted Critical
Publication of EP0269129B1 publication Critical patent/EP0269129B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
    • G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
    • G11B5/3922—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
    • G11B5/3925—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being thin films
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
    • G11B5/3958—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged in a single plane, e.g. "matrix" disposition
    • G11B5/3961—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged in a single plane, e.g. "matrix" disposition disposed at an angle to the direction of the track or relative movement
    • G11B5/3964—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged in a single plane, e.g. "matrix" disposition disposed at an angle to the direction of the track or relative movement for transducing on a single track

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Magnetic Heads (AREA)
EP87117664A 1986-11-28 1987-11-30 Thin film magnetic head Expired - Lifetime EP0269129B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP28478586A JPH065572B2 (en) 1986-11-28 1986-11-28 Thin film magnetic head
JP284785/86 1986-11-28
JP284787/86 1986-11-28
JP28478786A JPH0782612B2 (en) 1986-11-28 1986-11-28 Thin film magnetic head and method of manufacturing the same
JP284784/86 1986-11-28
JP28478486A JPH0618057B2 (en) 1986-11-28 1986-11-28 Thin film magnetic head

Publications (3)

Publication Number Publication Date
EP0269129A2 EP0269129A2 (en) 1988-06-01
EP0269129A3 true EP0269129A3 (en) 1990-09-19
EP0269129B1 EP0269129B1 (en) 1993-09-22

Family

ID=27337119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117664A Expired - Lifetime EP0269129B1 (en) 1986-11-28 1987-11-30 Thin film magnetic head

Country Status (3)

Country Link
US (1) US4954920A (en)
EP (1) EP0269129B1 (en)
DE (1) DE3787509T2 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940004989B1 (en) * 1989-08-04 1994-06-09 마쯔시다덴기산교 가부시기가이샤 Thin film magnetic head
JP2563597B2 (en) * 1989-08-04 1996-12-11 松下電器産業株式会社 Composite thin film magnetic head
JP2822646B2 (en) * 1989-10-11 1998-11-11 松下電器産業株式会社 Magnetoresistive head and method of manufacturing the same
FR2658647B1 (en) * 1990-02-21 1992-04-30 Commissariat Energie Atomique HORIZONTAL MAGNETIC HEAD WITH HALL EFFECT AND ITS MANUFACTURING METHOD.
JP3200060B2 (en) * 1990-09-12 2001-08-20 ソニー株式会社 Thin film magnetic head
MY107733A (en) * 1991-05-21 1996-05-30 Onstream Inc Combined read/write magnetic head
US5212611A (en) * 1991-07-16 1993-05-18 Storage Technology Corporation Integral read/write recording head with dual gap dimension
US5206774A (en) * 1991-07-26 1993-04-27 Storage Technology Corporation Process for making a magneto-resistive magnetic transducer having increased sensitivity and an improved flux path and the product made thereby
US5260653A (en) * 1992-06-03 1993-11-09 Eastman Kodak Company Thin film very high sensitivity magnetoresistive magnetometer having temperature compensation and simple domain stability
US5815342A (en) * 1992-07-13 1998-09-29 Kabushiki Kaisha Toshiba Perpendicular magnetic recording/reproducing apparatus
US5508868A (en) * 1993-01-25 1996-04-16 Read-Rite Corporation Dual element magnetoresistive sensing head having in-gap flux guide and flux closure piece with particular connection of magnetoresistive sensing elements to differential amplifier
JPH07270507A (en) * 1994-03-28 1995-10-20 Sony Corp Terrestrial magnetism azimuth sensor
JPH0817019A (en) * 1994-06-28 1996-01-19 Nec Corp Magneto-resistive head
EP0702357B1 (en) 1994-09-16 2003-06-18 Kabushiki Kaisha Toshiba Magneto-resistance effect head and magnetic recording/reproducing head thereof
KR100234172B1 (en) * 1995-01-27 1999-12-15 이형도 Magnetoresistive device of thin film magnetic head
US6256863B1 (en) * 1996-03-12 2001-07-10 Kabushiki Kaisha Toshiba Yoke type magnetoresistance head and manufacturing method of the same
US6256171B1 (en) 1996-09-30 2001-07-03 Kabushiki Kaisha Toshiba Thin film magnetic head having an improved heat dispersion and magnetic recording apparatus using the same
US6064552A (en) * 1997-03-18 2000-05-16 Kabushiki Kaisha Toshiba Magnetoresistive head having magnetic yoke and giant magnetoresistive element such that a first electrode is formed on the giant magnetoresistive element which in turn is formed on the magnetic yoke which acts as a second electrode
US6469873B1 (en) * 1997-04-25 2002-10-22 Hitachi, Ltd. Magnetic head and magnetic storage apparatus using the same
DE69717094T2 (en) 1997-07-18 2003-08-21 St Microelectronics Srl Partial head for a disk storage
JP3807592B2 (en) * 1999-06-24 2006-08-09 松下電器産業株式会社 Recording / reproducing head and recording / reproducing apparatus including the same
JP2005044847A (en) * 2003-07-23 2005-02-17 Tdk Corp Magnetoresistive element, magnetic storage cell, magnetic memory device, and method of manufacturing them
US7233142B1 (en) * 2004-09-02 2007-06-19 United States Of America As Represented By The Secretary Of The Army Planer reader of non-erasable magnetic media and local permeability
US7505233B2 (en) * 2004-12-15 2009-03-17 International Business Machines Corporation Magnetic sensor
US7317596B2 (en) * 2005-06-21 2008-01-08 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording disk drive having read head with high cross-track resolution and disk with low bit-aspect-ratio

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100583A (en) * 1975-07-17 1978-07-11 U.S. Philips Corporation Thin-film magnetic head for reading and writing information
EP0053343A1 (en) * 1980-11-28 1982-06-09 Hitachi, Ltd. Reproducing and amplifying circuit for magnetoresistive head
US4385334A (en) * 1979-07-18 1983-05-24 Olympus Optical Co., Ltd. Vertical magnetic recording and reproducing head and a method for manufacturing the head
US4388662A (en) * 1981-01-28 1983-06-14 Eastman Kodak Company Thin film magnetoresistive head
US4413296A (en) * 1979-07-16 1983-11-01 Eastman Kodak Company Thin film magnetoresistive head

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7901578A (en) * 1979-02-28 1980-09-01 Philips Nv MAGNETIC RESISTANCE HEAD.
US4652945A (en) * 1985-05-03 1987-03-24 Eastman Kodak Company Flux sensitive tracking

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100583A (en) * 1975-07-17 1978-07-11 U.S. Philips Corporation Thin-film magnetic head for reading and writing information
US4413296A (en) * 1979-07-16 1983-11-01 Eastman Kodak Company Thin film magnetoresistive head
US4385334A (en) * 1979-07-18 1983-05-24 Olympus Optical Co., Ltd. Vertical magnetic recording and reproducing head and a method for manufacturing the head
EP0053343A1 (en) * 1980-11-28 1982-06-09 Hitachi, Ltd. Reproducing and amplifying circuit for magnetoresistive head
US4388662A (en) * 1981-01-28 1983-06-14 Eastman Kodak Company Thin film magnetoresistive head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 23, no. 10, March 1981, NEW YORK US page 4644 t.schwarz: "magnetic head assembly with magnetoresistive sensor" *

Also Published As

Publication number Publication date
US4954920A (en) 1990-09-04
EP0269129A2 (en) 1988-06-01
DE3787509T2 (en) 1994-01-20
EP0269129B1 (en) 1993-09-22
DE3787509D1 (en) 1993-10-28

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